export RISCV_OPENOCD_PATH=/media/lingkong/Data/git/SiFive/toolchain/riscv-openocd-0.10.0-2019.08.2-x86_64-linux-ubuntu14
export RISCV_PATH=/media/lingkong/Data/git/SiFive/toolchain/riscv64-unknown-elf-gcc-8.3.0-2019.08.0-x86_64-linux-ubuntu14
